@KatyElphinstone
A bit more of a personal story useful?
I had big food issues as a kid. Particular textures, especially mixed like skins/soft and soft/sauce I can't deal with.
My mum says that as soon as I learned 'no', from about 1yr/18m onward, there were some foods I would just refuse to eat.
Very early on, my brain formed a map (attached).
Because of a few intensely awful experiences, I formed 'safe rules' - Basically no fruit and no veg. Because of certain triggers, anything similar was also suspect, leaving me only a very narrow path of safe foods.
Moving off the safe path, even in just the direction (e.g. a single orange segment used as cake decoration) caused huge anxiety.
Anxiety -> stress ->adrenaline->no appetite.
The 'edges' of these triggers were unclear, and it was a stressful time. Eating was like a lottery, each bite was like is this ok.... yes?, because triggers were so uncomfortable.
As an adult (>35), I have been able to carefully explore these boundaries and produce a better, safer map. These days, I can eat apples, strawberries, and several specific vegetables so my diet is a little more varied. Many of my old aversions still produce the same reaction though.
As an example, I was invited to a 'meet the brass' lunch meeting at work. While talking with the CTO, chatting and eating, I took a bite of what I thought was a chocolate chip muffin, but was actually a rasin muffin. The adrenaline kicked in and spat it straight onto my plate. Oops.